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Discussion Starter #1
Greetings new to the forum and a new owner of a 1990 coupe.
My lumbar control does nothing, makes no noise on either the passenger or drivers seat, so I am ruling out bad motors. I understand the power comes from a breaker, but my thinking would be if the seats move up and down and do everything else they are supposed to do, then the breaker/ fuse is good.
Any help would be appreciated!
Thanks
-Tommy
 

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I do not know if the 90 is the same as an 87 but when I had my 87 about 15 years ago my lumbar support backs quit working and what I found is the lumbar is controlled by a air pump under the bottom cushion to remove cushion push down on forward center of seat bottom and directly below on front of seat bottom feel for spring clip push clip back and remove cushion there should be a air pump with plastic hoses running to lumbar cushions remove hose to see if pumps are working if the pumps are working and I remember correctly the ends of the pumps can be removed and the rubber diaphram is usually bad when I had mine I think it was jayco pumps and I was able to order the ends or you can try to replace the diaphram with thin rubber from a latex glove.
 

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Discussion Starter #3
How audible are the pump motors in operation?
I can't hear anything from them, but I will pull up one of the seat cushions and check it out.
Thanks
-Tommy
 

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How audible are the pump motors in operation?
I can't hear anything from them, but I will pull up one of the seat cushions and check it out.
Thanks
-Tommy
my dad used to have a '90...the pumps definitely did make noise when in operation. they weren't very loud, but you could hear them for sure....if you're not getting any noise at all, your pumps are probably bad.
 

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I have a '91 vert and when I disassembled the passenger sport seat I found the lumbar air bags in a million pieces from age. I am merely presuming the drivers side to be the same. My pumps and the associated motors were fine after I followed an article similar to the above mentioned. Hope this helps.:thumbsup:
 
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